Texas Instruments ADS58B19IRGZT

Overview

ADS58B19IRGZT from Texas Instruments is a 9-bit, 250MSPS ultralow-power analog-to-digital converter with integrated high-impedance analog input buffer and DDR LVDS/CMOS digital interface. It delivers 55.7dBFS SNR and 76dBc SFDR at 150MHz input frequency, operates from 1.8V analog/digital supplies and 3.3V buffer supply, and targets wideband communications receiver chains requiring low power and high dynamic range.

For engineers reviewing the ADS58B19IRGZT datasheet, ADS58B19IRGZT pinout, ADS58B19IRGZT application, or ADS58B19IRGZT equivalent, key selection considerations include its 250MSPS sampling rate, SNR/SFDR trade-off via programmable gain, DC offset correction loop, low-swing LVDS output mode (200mV), and QFN-48 package compatibility with industrial temperature operation (–40°C to +85°C).

Technical Context

The ADS58B19IRGZT implements a pipelined ADC architecture with on-chip analog input buffers that maintain constant 4kΩ differential input impedance and 550MHz analog bandwidth across frequency. Its digital backend includes a DDR serializer supporting 500Mbps LVDS output and parallel CMOS mode with 1.8V logic levels.

It features a configurable serial interface (RESET/SCLK/SDATA/SEN) for register control, hardware-driven DC offset correction, and dynamic power scaling - reducing analog power to 258mW and I/O power to 69mW at full 250MSPS operation while preserving performance.

Key Specifications

Pinout & Package

ADS58B19IRGZT is housed in a thermally enhanced QFN-48 (7mm × 7mm) package with exposed PowerPAD™ connected to DRGND. Pin assignments are identical for LVDS and CMOS modes except for data pin multiplexing and CLKOUT configuration.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed ADC applications.

Compared with ADS58B18IRGZT and AD9237BCPZ-250, ADS58B19IRGZT uniquely balances 250MSPS speed, 9-bit resolution, integrated analog buffering, and ultralow power (258mW analog + 69mW I/O) - making it optimal for space-constrained, thermally sensitive wideband receiver designs where driver complexity and power budget are critical constraints.

Availability

ADS58B19IRGZT is available at Aetrix Electronics and suitable for direct IF sampling receivers, PA linearization feedback paths, software-defined radio front ends, test & measurement digitizer channels, and broadband communications infrastructure requiring stable component supply and industrial temperature operation.

Supply support for ADS58B19IRGZT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and high-performance data conversion technologies.

The ADS58B19IRGZT belongs to TI's ultralow-power ADS4xxx ADC family, designed specifically for wideband communications infrastructure where analog buffering, dynamic power scaling, and high SFDR at 250MSPS are essential.

FAQ

What is the maximum analog input frequency supported by the ADS58B19IRGZT?

The ADS58B19IRGZT supports analog input frequencies up to 600MHz when using a 1VPP differential input amplitude, and up to 400MHz at full-scale 1.5VPP. Its 550MHz analog input bandwidth ensures minimal signal attenuation and phase distortion within this range, enabling direct sampling of IF signals in modern wireless infrastructure without external bandpass filtering.

Does the ADS58B19IRGZT require external analog input buffering?

No - the ADS58B19IRGZT integrates a high-impedance analog input buffer with constant 4kΩ differential resistance and 2.1pF capacitance across frequency. This eliminates the need for external driver amplifiers in most wideband receiver applications, reducing board area, power, and signal path complexity compared to bufferless ADCs like the AD9237.

What digital output interfaces does the ADS58B19IRGZT support?

The ADS58B19IRGZT supports two digital output modes: DDR LVDS (with programmable 200mV or 350mV swing and 100Ω termination) and 1.8V parallel CMOS. The LVDS interface operates at up to 500Mbps, while the CMOS mode supports up to 250MHz clock rates with 8pF load capacitance per pin - both configurable via the DFS pin.

How does the ADS58B19IRGZT handle DC offset correction?

The ADS58B19IRGZT includes a hardware-based DC offset correction loop that automatically measures and cancels ADC core offset during operation. Enabled by default after reset, it requires no host processor intervention and maintains accuracy across temperature and process variation - critical for zero-IF and direct-conversion architectures where residual DC offsets degrade EVM.

Is the ADS58B19IRGZT pin-compatible with the ADS58B18IRGZT?

Yes - the ADS58B19IRGZT and ADS58B18IRGZT share identical QFN-48 (RGZ) packaging, pinout, and power sequencing requirements. They differ only in internal ADC core resolution (9-bit vs 11-bit), maximum sampling rate (250MSPS vs 200MSPS), and presence of SNRBoost functionality (ADS58B18 only), allowing drop-in replacement in many layouts with firmware-level adjustments.